METHOD OF CONTROLLING AN ACOUSTIC NOISE REDUCTION AUDIO SYSTEM BY USER TAPS
First Claim
1. A method for controlling an audio system, the method comprising:
- tapping at least one of a headphone worn by a user and an ear or a head of the user to cause an acoustic pressure change in an ear canal of the user, the ear canal being substantially sealed by an acoustic noise reduction (ANR) headphone having an ANR module;
sensing a current provided to the ANR module, the current being responsive to a pressure change in the ear canal;
determining a peak value from the sensed current;
comparing the peak value and a value of an adaptive threshold to determine if a tap occurred; and
if the tap is determined to have occurred, determining an updated value for the adaptive threshold based on the peak value and one or more prior peak values.
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Accused Products
Abstract
Described are a headphone and a method for controlling an audio system. The method includes tapping a headphone or head of a user to cause an acoustic pressure change in an ear canal of the user wherein the ear canal is sealed by an acoustic noise reduction (ANR) headphone having an ANR module. A current provided to the ANR module is sensed. A peak value of the sensed current is determined and compared to a value of an adaptive threshold to determine if a tap occurred. If a tap is determined to have occurred, an updated value for the adaptive threshold is determined based on the peak value and at least on prior peak value. A mode of operation of the audio system or an attribute of an audio input signal may be changed in response to the determination of an occurrence of a tap.
24 Citations
15 Claims
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1. A method for controlling an audio system, the method comprising:
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tapping at least one of a headphone worn by a user and an ear or a head of the user to cause an acoustic pressure change in an ear canal of the user, the ear canal being substantially sealed by an acoustic noise reduction (ANR) headphone having an ANR module; sensing a current provided to the ANR module, the current being responsive to a pressure change in the ear canal; determining a peak value from the sensed current; comparing the peak value and a value of an adaptive threshold to determine if a tap occurred; and if the tap is determined to have occurred, determining an updated value for the adaptive threshold based on the peak value and one or more prior peak values. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A headphone comprising:
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a microphone for detecting a pressure change in a substantially sealed cavity of the headphone, the cavity comprising an ear canal of a wearer of the headphone; an acoustic noise reduction (ANR) module coupled to the microphone for generating a noise cancellation signal to cancel noise detected by the microphone; and a processor in communication with the microphone and the ANR module, the processor configured to; sense a current provided to the ANR module, the current being responsive to a pressure change in the ear canal; determine a peak value from the sensed current; compare the peak value and a value of an adaptive threshold to determine if a tap occurred; and if the tap is determined to have occurred, determine an updated value for the adaptive threshold based on the peak value and one or more prior peak values. - View Dependent Claims (13, 14, 15)
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Specification